Import drools docs

drools-docs/.gitignore

@@ -0,0 +1,42 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# Local files
+/target
+/local
+/build
+/node
+/node_modules
+
+# Eclipse, Netbeans and IntelliJ files
+/.*
+!.gitignore
+!.gitattributes
+!.htaccess
+/nbproject
+/*.ipr
+/*.iws
+/*.iml
+
+# Repository wide ignore mac DS_Store files
+.DS_Store
+
+# Doc generation
+!.index.adoc
+
+# antora.yml is generated during maven build
+antora.yml

drools-docs/README.adoc

@@ -0,0 +1,38 @@
+////
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied.  See the License for the
+  specific language governing permissions and limitations
+  under the License.
+////
+
+= Drools documentation website
+
+https://www.drools.org/docs[www.drools.org/docs]
+
+== How it works
+
+pom.xml is configured to generate Antora documentation website using adoc contents under `src/modules`.
+
+`mvn clean package` does the steps:
+
+1. Create `antora.yml` file based on `antora-template.yml`
+2. install `node`, `npm` and `antora`
+3. Execute antora to generate a documentation website
+
+A start page of the generated site would be `target/website/docs/index.html`.
+
+To simplify the maintenance, the documentation website is based on a pre-built default Antora UI bundle
+located in `ui-bundle/ui-bundle.zip`. Customizations are located in `supplemental-ui` that Antora uses to replace
+parts of the default `ui-bundle.zip`.

drools-docs/antora-playbook.yml

@@ -0,0 +1,38 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+# We use author-mode for antora build because we generate antora.yml during the maven build
+site:
+  title: Drools Documentation
+  url: https://docs.drools.org/latest/drools-docs
+  start_page: drools::introduction/index.adoc
+  robots: allow
+content:
+  edit_url: ~
+  sources:
+    - url: ..
+      branches: [HEAD]
+      start_path: drools-docs/src
+ui:
+  bundle:
+    url: ./ui-bundle/ui-bundle.zip
+  supplemental_files: ./supplemental-ui
+antora:
+  extensions:
+    - '@antora/lunr-extension'